Turbulent Flow is MORE Awesome Than Laminar Flow

[@smartereveryday]

LAMINAR FLOW IS BETTER. Obviously the Laminar Boundary Layer section was the best part of the video. (I jest.) In all seriousness though I thought you did an amazing job with this content Derek. Discussing the transition to turbulence is very difficult and you did a masterful job of it here. Animating Reynold’s experiment on the page was masterful. Your point that laminar flow must be small was very interesting, and when I saw the images from space I had a fun time thinking about what parts were laminar and what parts were turbulent. I’ll put a link to this video on the laminar flow video. All these nice things being said....I have something up my sleeve!

[@veritasium]

Haha can't wait!

[@user5214]

@@veritasium haha me too

[@mewwww17]

I saw the title of this video and immediately knew Destin would make an appearance.

[@ALPHATHEREAL]

Was waiting for you😂lol . By the way both of you are a GREAT Inspiration for me. Keep inspiring♥️

[@sanguineronin9150]

I was just about to post "Don't let Smarter Everyday see this" and here you are 😂. EDIT: posted this before I watch the video, Destin is in the video too!

[@AthAthanasius]

I was NOT surprised to see Destin at the start of this as my first thought when I saw the title of this video in the notification email was "uh-oh, shots fired, Destin's not going to stand for this".

[@ewthmatth]

They were getting along so well. Now the eternal feud starts.

[@Lasersplitter]

This is the kind of KZbin beef I wanna see

[@gkarapeev]

haha yes, that's why I headed straight for the comment section before even watching the video :D

[@SilentGloves]

I literally came here to say "shots fired!" :D

[@eswarsai3903]

I thought the same!!

[@AMOGHAJAYANTHMK]

Here before Veritasium Vs Smarter Everyday diss tracks.

[@aneomgr7798]

to the top u go

[@randomdude9135]

Who the hell is Bob and why you wanna kiss him Edit: Continue this guys, you're embarrassing me

[@longlivetheking1256]

Rick don't smash that mini universe again

[@ivanjones6957]

can we get this to 1000 likes in one day?

[@Thuebner1104]

Epic Rap Battles of History

[@FlynChse]

Took a class just called “Turbulence” during my aerospace M.S. and I understood just as much about turbulent flow at the end of the course as at the beginning.

[@ahbyt5630]

me too

[@TheRealYaworm]

I would have agreed, if he'd covered the inertial subrange. :(

[@thethinkingmansgame5050]

Sooo you wasted time and money... when a 20 min video would have been 50 time better... hmmm seems like college is a joke

[@dexter2392]

@@thethinkingmansgame5050 the problem isn't college, we just don't know much about turbulent flow yet. there's a million dollar prize related to that

[@unicockboy1666]

​​@@thethinkingmansgame5050 if you think that college is a joke go ahead and do a multi million dollar fluid simulation for an aviation company without specialized knowledge. Good luck sir.

[@OHYS]

2020 has already been a turbulent year, but I wasn't expecting WW3 to erupt between Smarter Every Day and Veritasium

[@SuperBoomer95]

And just like that, Canada and the US became enemies

[@adarshshrivastav7552]

enough for this year........we cant handle more now

[@shoitah]

Some prefer it turbulent ;)

[@Alan_Alien]

TeamVeritasium / TeamCanada all the way 🤘🏼😛

[@livethefuture2492]

Well Derek is from Australia, so I guess US vs Emus! Guess who'd win?

[@blackscoped]

When the two smartest kids in class have different answers:

[@tuckercates409]

Kid pops up from under the desk. "Hey Vsauce, Michael here."

[@aadarsh_1303x]

@@tuckercates409 MICHEAL THE 3RD EXCEPTION KID

[@MrCash-lm1xz]

Tucker Cates Nah, he’s the teacher.

[@shintenkai1648]

@@tuckercates409 LOL I visualized that and I died

[@lalalanidani]

deadass yo im rollin at this

[@JM-us3fr]

As soon as I saw the title, I was like, "Oh man, he's picking a fight with Destin. This is gonna be good"

[@danchisholm1]

I love the play that you and destin have. you guys are becoming cornerstones of science and yet your friendship makes it so friendly and kind.

[@delta927canadien-francais5]

I’m pretty sure this is the closest thing to a disstrack we’ll see from these guys

[@Hexnilium]

Delta927 Canadien-français East Coast, West Coast vibes.

[@daanydoomboy5593]

@Isabella Ngo "Hey it's Scarce here and today's story is HUGE!"

[@calvinnorth9642]

My thoughts exactly 😂

[@emon2689]

Lol I'm dead 💀🤣🤣

[@klipzz1405]

Wow🤣🤣🤣🤣🤣

[@starship4282]

As an aerospace engineer I'm so glad this video was made. I love Destin's video on laminar flow but I kept thinking "but but but the flow is so much easier to separate if the flow is laminar" But also, you can't just mention that a dead fish can swim upstream in a sentence and move on! That deserves it's own video! How does something move upstream without it expending energy! How does an object move forwards when you blow on it! The only explanation I have is there is lower pressure closer to where the vortex is shed than far downstream, so the fish is being "blown" upstream by the pressure difference...

[@hanbanaroda]

I would excpect that the energy was transfered to the "spring" which is backbone and muscles, but Im only guessing. Need to see a video with explanation!

[@corrick4339]

Sounds about right. There would be vortexes right behind the fish that curl around and hit the fish? Edit: and there may be vortexes that form around the scales and fins of the fish as well

[@leodip97]

There's a pretty famous experiment in which the drag on an object behind another one gets a negative drag and is pushed forward instead

[@matthewsparkes1707]

SAME!! I'm doing my PhD in Mathematical biofluids, and fish swimming upstream without expending energy is freaking awesome!

[@baikia777]

Oooh that fish swimming upstream is a very interesting topic for a video! Comment this on Destin's video too. Maybe in a few months he'll post a video about it lol

[@lfk51651]

The first thing i thought when i saw this title is "You just started a war with Destin".😀😀😀

[@cmac6136]

Exactly what I was thinking. Lol

[@EvanMoon]

My toes are in the water and I’m standing On Dustin’s side

[@Mooba2]

I agree with Destin. Laminar flow is the rare case of physics creating order. Chaos is beautiful but common. There are very few things I enjoy more than seeing water flow over a rock in a stream to create laminar flow

[@liriodosvales2009]

Yesss

[@adarsh1403]

Correct 😁

[@OchsSlayer]

As a plumber, this is fantastic. I've tried explaining these concepts to people and it is hard for them to grasp without visual representations of what the concepts are. In plumbing, turbulence is the enemy. Everyone thinks more is better and IT IS NOT.

[@muhammadsyafiq1991]

imo, pipes are mainly designed to induce laminar flow, so it will suck if suddenly the flow still becomes turbulence inside.

[@erickgomez7775]

I wonder how much extra money we spend in plumbing due to our lack of understanding of turbulence

[@OchsSlayer]

@@erickgomez7775 a ton. I work primarily commercial and I spend most of my time on replacing or repairing copper piping and fittings. It is one of the most turbulent systems out there. The pipe just gets destroyed.

[@ramsay5738]

@@OchsSlayercavitation erosion? I know thats occurs at bends predominantly but is that where most pipes get destroyed?

[@GODOFMAYHEM96]

Engineer throws dead fish in the water. Engineer: "Behold, Necromancy!"

[@MrDSimba]

Any other Chem Engineers here? Bomb squad?

[@a006delta]

Some tazor loving crackhead: "Be free!"

[@Megalomaniakaal]

666 upvotes, better not mess with perfection.

[@MoarteaLunii]

@@Megalomaniakaal cringe

[@chunmunsgoel3633]

Finally got to that portion of the video. I want to know what mad scientist thought up that experiment.

[@numbers93]

turbulent flow: *exists* fish swimming upstream: cHaOs Is A lAdDeR

[@manuraccoder1478]

ngl chaos is a ladder is my new life moto

[@salazarian]

omfg lollllllllllllll

[@Zedryx69]

Jevil: **proceeds to climb up a waterfall** also Jevil: *Kris, why are you looking at me like that?*

[@gbm6882]

virgin turbulent flow: nooo you can’t harness my chaos for your evolutionary fitness. Chad Fish: haha climb ladder

[@G_Genie]

@@Zedryx69 "I can do anything! Chaos! Chaos!"

[@Bakhrod94]

Friendship ended with Laminar flow, now turbulent flow is my best Friend

[@justasciencelover8175]

Saaaaaaaaaame

[@ploopybear]

don't expect to be as stable

[@jjsdumbshit2792]

Noooooooooooooo

[@nemianyamele2265]

Them ones when the friendship's Reynolds number increases

[@anaszia6934]

Karma will get you.

[@isaacteal]

This is the one of the best science/info vids I have seen on KZbin. I’m a weather forecaster and this does such a great job helping visualize what is going on in 3d space

[@ceejec]

"laminar flow is slow, superficial. It's a toy. That's why its most notable use is on decorative fountains" Most scientific diss track on KZbin

[@mydearfriend007]

*use

[@punkisinthedetails1470]

dissipative

[@moonhowler667]

I wonder if he's ever seen the systems that lubricate industrial band saws and other things like metal lathes. Most of what I've seen uses laminar flow because, what's the point of spraying a shower of oil all over everything when you need lots in a small spot?

[@mattaomartinez.9817]

@@moonhowler667 because bukkake

[@Alkis05]

You should look at Dr Sabine Hosssenfelder's (Physicist) PMV. There are some literal diss tracks there. She makes fun about people send her their "Theory of Everything" proposals for her to review. Particularly, she pokes fun at one of those "intelectual dark web" guys.

[@jokeal3613]

Never heard this term before, but this morning I was thinking about how the cream in my coffee swirls beautifully and switched directions so many times- now I know what it is called. Thank you for helping me become smarter everyday.

[@gonzalezm244]

Jokeal After your coffee finishes swirling there’ll be at least one particle that returned to its exact original starting point :)

[@hellodumplings8564]

Knowing things doesn’t make you smart

[@questionminecrafter]

@@hellodumplings8564 the almighty has spoken

[@koktszfung]

@@hellodumplings8564 not commenting doesn't make you illiterate

[@xide7123]

exactly like me! xD

[@geryz7549]

14:39 "So how are we going to harvest the energy of these vortices" "Put a dead fish in there" "What?" " *PUT A DEAD FISH IN IT* "

[@rat_king-]

You miss understand the madness of an engineers. This is normal

[@mayrunesdaygone8094]

"Puts a Dead Rat in It"

[@rat_king-]

@@mayrunesdaygone8094 Lobster vs Cow aerodynamics

[@SteamPunkPhysics]

Monty python predicted this when they intimated one could cut down the mightiest tree in the forest with a herring. HEED THE PROPHECY!

[@ljmeyerful]

Geryz , it would be cool that a boat put in water with specific vortices could flow upstream. This is an interesting prospect. The boat being the dead fish.

[@billdoolinofficial]

I didnt knew the term of it. But always loved the turbulence flow. Started loving it when i paint and wash my brush my in the water. Colors mixed in water in a beautiful way.

[@flyprdu]

I had a meteorology professor that had a saying when talking about the atmosphere: "Big swirls, have smaller swirls, which feed on their velocity. Smaller swirls have lesser swirls, and so on to viscosity."

[@jiayang6895]

This is quote from Lewis Fry Richardson

[@tomf3150]

Kolmogorov.

[@indigo1324]

I saw the title and instantly thought, “Smarter Every Day is gonna be mad.” XD

[@arbs-5164]

Yeah me too

[@smartereveryday]

Not at all. I agree that turbulence is awesome.

[@jorge9199]

Lmao

[@DiscoveredMate]

@@smartereveryday OMG MY FAVORITE KZbinR

[@DiscoveredMate]

@@smartereveryday I WAS INSPIRED BY YOU CAN YOU SHOUT ME OUT IN YOUR NEXT VIDEO I WOULD BE VERY HAPPY

[@adamberry8182]

Child: "Is that fish alive?" Parent: "Yes, you can see it swimming upstream" Me: "Well actually..."

[@actually5004]

WHAT.

[@jaredtweed7826]

14:40

[@porc1429]

Oh shoot

[@danielyuan9862]

"Why is the fish flopping so much?"

[@williaml2579]

you mean the fish at 14:40 is dead?

[@franklinwest3418]

Nailed it! This was a difficult topic when I was in school, but you made it seem easy. My son who is in grade school really got into it. Keep it up!

[@whogavehimafork]

I'm a mechanical engineer and I once did a project in my senior fluids lab studying drag coefficients of rough spheres versus smooth spheres and other objects with round cross sections. We demonstrated that 1. The rough sphere had a smaller drag coefficient in the wind tunnel due to induced turbulence at the surface, and 2. You must always remember to prop open the door so that it doesn't slam closed when you power up the tunnel and disturb the computer science students in the lab next door.

[@maniacal_engineer]

Word When they were testing the cold weather capability of the SR-71 in a refrigerated hangar at eglund AFB in florida, the Lockheed guys asked the AFB guys if the hangars could handle the SR's engines airflow. They were told it was not a problem. So when the SR started up (with the exhaust piped outside to keep the hangar cold) It entirely collapsed the HVAC ducting in the hangar. OOPS.

[@hhiippiittyy]

@@maniacal_engineer That sounds like one of those "oh crap their figures were metric" kind of things.

[@ThatBoomerDude56]

And it was important to not disturb the computer science students in the lab next door because?? --- They were sleeping???

[@liesdamnlies3372]

@@ThatBoomerDude56 Yes. Code was compiling. Perfect time to get sleep. Or have sword fights.

[@rpgtrainer]

so, would a car with a rough outer skin have a better drag coefficient than a very glossy, polished skinned car? LETS TEST IT!

[@rocket6173]

"Turbulent flow is better than laminar flow" Destin: they be some fighting words.

[@zerg9523]

I’ll bet the farm on destin...

[@aydenchaffee5926]

I love how the quality of his videos haven’t changed in 7 years, and that’s a good thing for him

[@AMZG]

You aren't supposed to insult people😠😠

[@oliverm1255]

Its a rare sighting among KZbinrs.

[@aaron_manna]

I wish vsauce was still old vsauce, like Derek here is. New vsauce is still cool tho

[@إرينتاسكين]

Skases kzbin.info/www/bejne/n4iQkoKsrrRsZ68

[@luckyjohny181]

@Bude Lasial that doesnt mean vsauce suck

[@smitkapadia8080]

I have been confused about laminar, turbulent flows and boundary layers. Thank you very much for making a video with these amazing animations and explaining these crucial concepts in an easy-to-understand manner!!

[@EdwardChan.999]

15:13 Fish: *dies* Turbulent Flow: Dead or Alive, you're coming with me

[@connorryan4231]

My thoughts exactly

[@Patrick94GSR]

RoboFlow!

[@ethantaylor3584]

Fish: dies Why did I laugh so hard at this

[@superragaone11]

you are coming to brazil

[@lucas29476]

Derek: Turbulence is amazing Destin: So you have chosen death

[@unity_talon]

The battle of the two Ds

[@RageFireMaster]

OMAE WA MOU SHINDEIRU

[@unity_talon]

@@RageFireMaster Nani?

[@shybrain]

As an aerospace engineering student, this was a love letter

[@theyigo9362]

as a mechanical engineering student, this was a sex invitation

[@DJGuppy321]

Yeah, I was really pleased with myself that I literally already knew everything in the video. Im mechanical though, but my university is really big on aerospace so a lot of my classes are fluids related.

[@theyigo9362]

@@DJGuppy321 fluids are much more fun than solids though, especially fluid dynamics is much better than solid dynamics

[@wannabe1641]

To be an aerospace engineer is what I dream of :)

[@peppi0304]

As a meteorologist too :)

[@simchannel7052]

i love the banter between you and smarter everyday. you guys are just awesome, and are the best thing to hit youtube!

[@FCHenchy]

"...But what if we put a dead fish in it?" - Science

[@yocats9974]

When he said dead fish I thought "Why a dead fish and who thought that would be a good idea?"

[@johnk7302]

I liked the dead fish idea. It demonstrates that the structure of the fish is such that minimal energy is required for movement,

[@Ofinfinitejest]

My view of salmon as strong and dedicated has been sadly deflated.

[@Full_Counter]

Lets see how the fish figured out the turbulent flow formula in evolution lol.

[@daniel-zt6im]

I bet this phenomenon was discovered when a scientist threw his dead finsh into the toilet .

[@alexmarte402]

Instantly thought of how destin would feel after reading the title😂

[@smoothyreal2205]

Alex Marte same

[@JadeMythriil]

This was recommended to me from his most recent video.

[@somyadeepbhargava7030]

I've been flying kites in this lockdown period everyday and one thing i noticed was when wind blows and lifts the kite and then at a certain point when its going steadily up, at a certain angle the lift developed in it suddenly becomes zero and its shoots down itself to the ground as if it was a crashing rocket and you can't stop it, now at 10:28 i realized why it happens, this question was really stuck in my mind for a long time

[@denchua]

Maybe you can now modify the kite to fly longer without stalling.

[@WaitItGetsBetter]

It very similar but kites work different than airfoils. Kites achieve lift from drag unlike airfoils. I imagine as the kite rises you actually get a lower angle of attack which in turn reduces drag and in turn, lift. Airfoils on planes stall with a higher angle of attack.

[@Holt196]

Please modify the kite! We want to be updated on your future kite endeavors, kind sir.

[@saurabhmangal6322]

@Kenn P62 I think you talking about Indian fighter kites... I fly them and know about the V technique but other than that I never realized that turbulence could be a factor. Good observation Somyadeep Bhargava

[@areshy4787]

Nice name

[@dblaze23]

4:39 dude’s performing a science experiment while actively getting shot by an arrow bolt. Respect.

[@krizi4970]

Imagine two guys arguing over the internet about some flowy water. And millions of people interested in that.

[@scotthenrie5674]

When peeing laminar flow is better than turbulent flow.

[@BoomBrush]

@@scotthenrie5674 I dont know if this is true but i read somewhere that pee that comes out of your wang is rotating around like a corkscrew before it leaves.

[@shukrantpatil]

BoomBrush but then it’s turbulent right ? Or wait, the path is predictable so it’s laminar?

[@aguyfromnothere]

Better than watching more looters and corporations ads trying to convince me they care about things.

[@wajideus4591]

"If you put a dead fish in the wake of an object, it'll actually swim upstream" - That's clearly a software bug.

[@StingerPhilip]

Sounds like you've been dwelling in the world of simulation theory. The bugs are everywhere.

[@fionnbegley4382]

It's called a slipstream if I'm not mistaken, it's common in racing

[@millenniusrex]

...will be patched in the next software version

[@Matio25091]

I heard that update 2020.8 should fix that.

[@thabestsniper]

Wow, wait until the guys on r/outside hear about it... the devs need to do something

[@electriccruiser7796]

Me, an engineer who just likes easier math associated with Laminar Flow: my opinion on Laminar being better than Turbulent will remain unchanged.

[@catcherboy96]

Hey but alpha is only 1 with turbulent.

[@Jackisaboss1208]

Steady state, 1D, symmetric flow with no body force please

[@electriccruiser7796]

@lil Chungus Lesser being? You are not welcome into the Elite Society of Engineers.

[@electriccruiser7796]

@lil Chungus Likewise

[@electriccruiser7796]

@lil Chungus Huzzah! a man of culture

[@charliekempf]

I study aerospace engineering and this helped me better understand my entire fluid dynamics course. Thanks man👍

[@7stiano123]

You're father wrote Hitler's book

[@sssharefff]

"Turbulent flow is more awesome than a laminar flow." Destin: *Hol up*

[@adhityabhaskaran4093]

Cul Doode LoL

[@neldino1251]

not like he said that in the vid

[@nyanuar123]

n o

[@ashanarachchige2716]

helloo fellow 9gagger

[@datdang9113]

Destin: *tHaT's iLleGaL*

[@kevinndayishimiye934]

destin when he gets this notification *whoms't has summoned the almighty one*

[@bhu1334]

Destin would certainly get trigerred

[@allegrovivace6806]

he's literally in the video kevin ndayishimiye

[@kevinndayishimiye934]

@@allegrovivace6806 i commented before i watched it

[@greatnate3816]

@@kevinndayishimiye934 whomst'd'even't

[@halobiohazard]

Fun fact: during the South African wold cup, FIFA “nerfed” their soccer ball by making it smoother so the players couldn’t have TOO much control over the predicted flight path of the ball, much to the frustration of the players.

[@valarionch]

​@@cap5856 There was some controversy with the ball, called Jabulani: phys.org/news/2010-06-jabulani-ball-straight-scientists.html

[@halobiohazard]

@@cap5856 www.google.com/search?q=south+africa+world+cup+ball+controversy&rlz=1C5CHFA_enUS888US896&oq=south+africa+world+cup+ball+&aqs=chrome.2.69i57j0l7.10375j0j7&sourceid=chrome&ie=UTF-8

[@halobiohazard]

@@cap5856 "Brazilian striker Luís Fabiano called the ball "supernatural", as it unpredictably changed direction when traveling through the air.[20] Brazilian striker Robinho stated, "For sure the guy who designed this ball never played football. But there is nothing we can do; we have to play with it.""

[@SlowWinterNuts]

That's amazing. I love mixing a bit of chaos into well predicted stuff like that, it makes things all the more interesting

[@w0ttheh3ll]

lol. imagine these guys, training every day for 20 years to be able to send that ball where they want it to go, and then they are given a ball that doesn't work *during the world cup*.

[@elevatordancer]

Loved this! It’s quite apparent that turbulent flow makes life possible, but there is one very important use for laminar flow, and that is in biosafety. Biosafety cabinets are engineered to produce laminar flow in the air, and this creates a barrier that helps to prevent biohazards and pathogens from escaping the biosafety cabinet while working on biological experiments inside the cabinet. The laminar flow can push biohazardous material that has become aerosolized through the flow and into the HEPA filter before it leaves the cabinet space.

[@edquinteros9133]

Turbulent flow reminds me of Van Gogh's painting "Starry Night" and his artwork in general

[@gautamnest149]

cool you mention that, read somewhere that researchers found those flow patterns in the painting to have shared turbulent properties to the flows observed in nebulae and star nurseries

[@TheGreatGopib]

Interestingly I was reading to see if there was a connection between the golden ratio and turbulent flow and I saw there was a connection between the painting and turbulent flow

[@tylerwyka9290]

Yea I saw a ted video that talked about how insane it was that he drew turbulent flow so accurately all while he was cooped up in a mental hospital and people didn’t even really know about turbulence as a natural phenomenon

[@xeno4162]

@@gautamnest149 The flow patterns also satisfy the current visualization of the turbulent flow,considering it was painted long time ago. And Sir da vinci also painted a pattern(about 500 years ago) that satisfied the modern ideas about turbulence.

[@akhil29897]

Damn that’s the first thought that came to my mind when I saw the turbulent flow example

[@Ktulu789]

I was expecting Destin to be named. I wasn't dissapointed :-D But Chris Hadfield? This epic! And it's only 0:23 in.

[@ZomB1986]

same² He forgot to mention Chris is also a musician.

[@HercadosP]

Just to promote Chris Hadfield's son's YT channel since the opportunity presented itself. You should all check out Rare Earth, his son makes mini documentaries covering thought provocative topics

[@fel-]

This title is a direct attack on Destin. I'm just waiting for the payback

[@OHYS]

I think you mean the diss track.

[@johiahdoesstuff1614]

Internet drama! Internet drama! Internet drama! Internet drama! I love both channels and I feel like this is an intentional poke at Destin Edit: I said this before watching the video and immediately bam Destin

[@onr-o1h]

My first thought exactly. 😂

[@rahul.r]

Hahaha

[@seanmashley9228]

@@OHYS I bet their diss track will have some sick flow .... to its lyrics ;)

[@Yaviah20]

jajaja i love this colaboration between you two

[@alphaxalex1634]

Can we just say that the liquid he’s playing with looks amazing

[@ALPHATHEREAL]

Yeah and I like your name by the way😉

[@felipelebron7660]

No... We can't!!!🤨

[@alexanderjohnson2309]

Hey Alex's!

[@rogerc7960]

Needs glitter, uv light, thermal energy

[@tommihommi1]

looks like a certain PC cooling fluid

[@Alkis05]

the dead fish swinmming was actually impressive

[@omgitxalex3914]

how he do that

[@Alkis05]

@@omgitxalex3914 My best guess is that the rock creates a vortex that locks it in a general position while also creating oscilations in the stream with which the fish end up ressonating with. The oscillations must be high frequency enough to propel it forward. It is like the movement of a flag mixed with the behavior of a sail powering a boat against the wind. It uses the energy available in the water flow. This probably evolved so these fish can rest behind rocks when climbing rivers during the mate season. Once I saw a guy using genetic algoritms and fluid dynamics simulation to find optimal shapes of wind mills so it would be super efficient. Truely amazing.

[@Quifuh]

@@Alkis05 But... It's dead.

[@Alkis05]

@@Quifuh That is what makes it impressive, isn't it. That is why I made the reference to sails and flags, which are not alive either. Flags have movement created by air flow, and sails can propel an object against wind flow. I'm actually thinking of showing this to a professor of mine who studies aquatic robots. There are labs here that research both the hydrodynamics and the electronic/automation part of it in my campus.

[@Quifuh]

@@Alkis05 That's interesting. Do show the video to your professor, he most likely will enjoy it.

[@larz46672]

As a professional pilot, I can say this is by far the best explanation of these effects I have ever seen. I wish I had this when I was first learning about this. Would have made the concepts so much easier to understand! All new pilots should watch this video, especially the parts on Rynolds number!

[@Jdrew27]

CFI here, definitely will be showing this video to all students.

[@ShadoeLass]

CPL here, agreed

[@davidschutz2819]

That’s what I thought. ATPL Student learning for my 13 exams. It’s interesting

[@larz46672]

@@7Fatguy More that this does a much better job explaining a complex subject that often takes a good long while for student pilots to understand

[@derrickbecker9856]

Better than explaining laminar and turbulent flow differences using Reynolds number?

[@eliezerzavala9925]

This man literally answered my entire aerodynamics test I took a week ago. Tremendously useful video, would've loved to see it while studying.

[@monke.2191]

hi dear

[@boosie4l133]

Every body gangsta till the dead fish starts swimming

[@figa5567]

One of the biggest WTF moments for me

[@prestonwardle9862]

Me hearing herbal space program music in the background.....hhhmmmmm :)

[@sewerrat7321]

Dead or alive, you're swimming up stream.

[@KibanyaG]

Haha.. #WestSideGangSign

[@discretionadvised7615]

@@figa5567 I had to rewind and listen again when he said that

[@Nostson]

"Transitional Flow is the BEST" Video when?

[@NuclearTopSpot]

Hey! I identify as unsteady, uniform, compressible rotational flow and I find this statement offensive. #allflowsmatter

[@themagiccookie2614]

wut

[@juhonikula6408]

@TRICLO Here is a man of science

[@fodebic5253]

Is flow is the best... This is what : kzbin.info/www/bejne/onTPaHxtpdOaZpo

[@savy6354]

Actually progressive flo is the best... She's the best

[@TheDragonaf1]

As a master's in mathematics the Navier Stoke equations brings back nothing but very difficult memories. Edit: this video is basically the summery of my fluid dynamics course.

[@DurveshKorgaonkar]

what research is actually done when applied mathematicians say they study Navier Stokes Equations or fluid dynamics? I am genuinely interested.

[@cleanpoop9929]

@@DurveshKorgaonkar Modeling probably

[@MrIsleNFair]

Me, a student in oceanography, can relate well The moment you have to rewrite completely a rotational-turbulent-term on 3 dimension

[@jonbowman7686]

yep! engineering students would say the exact same thing

[@deepstariaenigmatica2601]

@@DurveshKorgaonkar most try solving it in 3d with sims i guess but fail miserably 😂

[@UhKimboze]

“You are looking at the motion of air in a room *ad starts* where you can surf without getting phished.” Damn that’s some good timing.

[@xavierdrayton-harrold4138]

"Turbulent flow is more awesome than laminar flow" Destin: *So you have chosen... death*

[@j0qr]

15:16 "In contrast, Laminar Flow is small, superficial (cue clip of Destin happily playing with Laminar Flow), it's... a toy" priceless

[@monke.2191]

centrfugeul

[@fgkurehgyu2]

Life is turbulent, and the things I love are laminar

[@denav.a2305]

Mission successfully failed

[@youtubepremium6944]

Yes bro Laminar flow is like your Crush that will never meet u but U lover her and Turbulent flow is your friends

[@redcorruption4561]

Snap back to reality

[@97gorrilla]

This sounds more suicidal than I’m sure originally meant

[@TheBluePhoenix008]

Wise man, give us your wisdom.

[@stevemillar]

This just made me appreciate Laminar flow even more! I'm looking forward to what you've got up your sleeve, Destin 😄

[@MrCCCOMBO]

Destin: LISTEN HERE U LITTLE SCIENTIST

[@KxKaijo]

Val Fiuta yes

[@howardbaxter2514]

I was thinking the exact same thing. Destin loves laminar flow.

[@forsaken841]

When you get stuck on the toilet learning about turbulent flow... THATS chaos theory.

[@drumbum7999]

accurate

[@venkatchait007]

hope u used a flushable wipe

[@festusbojangles7027]

reading your comment on the toilet

[@thetalantonx]

Speaking of Chaos: Big whorls have small whorls that feed on their velocity And small whorls have smaller whorls and so on to viscosity.

[@chrisjernigan1912]

poop...uh uhh... FINDS a way

[@mahery4315]

"It's most notable use is in fountains" Particle processing: bruh

[@mcmoler5334]

I don’t get it😑

[@professory4320]

Is bruh always a thing?

[@Immooooo]

@@professory4320 maybe?

[@moon-pw1bi]

@@professory4320 maybe?

[@vasudevraghav2109]

@@professory4320 bruh is turbulent...... It is everywhere in social media

[@mfrnd3]

What a video! Hats off You have taken very good examples and took really much efforts to portray it Hats off

[@Contra1828]

"When I meet God, I am going to ask him two questions: Why relativity ? And why turbulence ? I really believe he will have an answer for the first." - Werner Heisenberg

[@phosphorus4]

Already in a comment

[@Infaviored]

The first to give you the possibility to meet me later in life. And the second to describe your emotions once you did.

[@justinl2009]

I'm gonna ask him if he plays Pokemon.

[@andrewbergamann7982]

You're goddamn right!

[@ylstorage7085]

I HAVE ANSWERS FOR BOTH: SH*T WILL ALWAYS HAPPEN. TOO MUCH SH*T HAPPEN AT THE SAME TIME.

[@csn583]

"Big whorls have little whorls Which feed on their velocity, And little whorls have lesser whorls And so on to viscosity." - Lewis Fry Richardson It's whortles all the way down! Entropy is the driving force of literally everything. Even local order (life itself, you reading this sentence) exists because it is the most direct path to disorder and the heat death of the universe. Laminar flow is cool because it's one of those rare occasions where simple equations become visibly manifest in the world. It's pretty important at tiny scales which is where a lot of engineering happens these days of course. As an (EV) aerodynamicist/thermal-fluid engineer I've dealt mostly with turbulent flows (i.e., their statistical averages), but millimeter-scale coolant channels have recently forced me to stop neglecting the laminar regime! I also just purged my library of excess books and old notes yesterday, so this is a nice synchronicity for me. So, so many partial derivatives...

[@76Eliam]

The quote on literally every PhD thesis on fluid mechanics :D

[@abrahamvivas9540]

Because its just that! a regime! both turbulent and laminar regimes are sides of the same coin: viscous fluid phenomenon

[@richbuilds_com]

Great fleas have little fleas upon their backs to bite 'em, And little fleas have lesser fleas, and so ad infinitum - Augustus De Morgan,

[@faederSSF]

I thought you were quoting Lupe Fiasco, I'm dumb.

[@gilamesh3417]

Thank you so much Derek for this video. Having one of the most difficult to grasp and explain topics in such a succinct video brings a real smile. As someone who has publications in high Reynolds number turbulent pipe flows, turbulent boundary layers as well as engineering surfaces for desired roughness and it's applications to drag reduction on spheres, this is one of my favourite videos of all time. Having Professor McKeon there as well is great, she is a true outstanding leader in the field. Please don't stop making videos :)

[@the_profesion]

Some channels just spam their sponsors, but you prove that they work. Great

[@commode7x]

"That's space station commander Chris Hatfield" We live in a time when hearing that is both awesome and mundane all at once.

[@emilie8170]

Well I dont know about other people, but I'm a big fan of him so when I heard his name I was thinking more awesome.

[@caleb1031]

@@emilie8170 I think he's getting at how the once mystical is now known. Like when I was a child and I heard the term space station commander it raised images of some monolithic character. But now because of things like youtube, and age/maturity, I realize he's just some dude like me.

[@emilie8170]

@@caleb1031 yeah I got that, that's why I said because i'm a big fan I still think hes awesome.

[@ebtm3317]

@Ganda Gandara ?

[@christopherdinoguy8346]

Chris Hadfield is a very nice person, he once emailed me back when I tried to contact him teaching me life lessons when I was very depressed. A very kind person, easily my favourite astronaut.

[@jeremyburch5850]

Do not flush so called "flushable" wipes. Just throw them in the trash. Tearing is not the same thing as disintegrating. I work on sewer systems. Those things get hair and grease and other material attached to them and they bind up pumps and other equipment and ultimately have to be removed, costing your sewer utility tens of thousands of dollars a year for the smallest of systems.

[@mrendroid609]

Yeah this needs awareness

[@nicktecky55]

Drain Addict clears drain blockages on YT. He showed the problem clearly, and most importantly how to check if "paper" should be flushed or not. Just leave the item to soak for a minute in cold water. If it disintegrates, it's flushable. If it doesn't it isn't. What surprised me is that it isn't just baby wipes, although they get the blame. Just about every product that isn't toilet tissue fails the test. What's worse is that the products aren't labelled with their components, it's just called "tissue", often no mention of paper at all. All that "Man Strength" tissue? Just as bad. Is it better for this stuff to be in landfill, rather than the ocean? Who knows?

[@AtheistIII]

yup. The only thing worse than baby wipes imo are Tampons. Those strings at the end are incredibly tough and absolutely love getting snagged and wound up by pumps, blocking or damaging them and are an absolute bitch to remove. Sewer systems are a lot higher maintenance than a lot of people think as is, and serious failure is always messy, so please don't make our job harder or dirtier than it already is.

[@CASANOVAPRO1985]

I just told my dad this . Make a KZbin video proving it

[@CASANOVAPRO1985]

For him being a smart guy he sure does Dumb stuff lol

[@dumpsterfire4269]

"Turbulent flow is more awsome than laminar flow" Destin: *say sike right now*

[@10thletter40]

Turbulent is more useful but laminar is cooler

[@Blox117]

what the hell is sike?

[@marcelszekowski315]

Blox117 it means ”just kidding” i think

[@5t757]

It's spelt "psych" as in "haha I psyched you out".

[@CRosa0125]

my dude just explained it better than my fluid mechanics prof at uni.

[@jwalker6260]

“Laminar is easier to love” made no sense to me at first. Now, you couldn’t have simplified it better. Well done!

[@gaeist3048]

Turbulent flow arrives KZbin compression: so you've chosen death.

[@megustaelfalonegro]

the most underrated comment of the whole video

[@zechariahm.s8576]

I don't get it

[@lyq232]

@@zechariahm.s8576 because to properly show vortices on a video, you need high bitrate, but KZbin compression messes up with the visuals in the video.

[@zechariahm.s8576]

@@lyq232 smart thanks dude 🤑

[@lyq232]

@@zechariahm.s8576 glad to help

[@nachikethks8091]

The only youtuber that uses the sponsorer to make a science experiment.

[@bacon6814]

Mark Rober??

[@darkrathwheito9818]

Incredible the use of science with the sponsor, explaining scientifically how they're different, and what benefits they can have, just awesome, i'mma buy some just for the sake of experimentation.

[@IanJBarker]

I remember struggling with fluid dynamics more than any other class in college because, until then, science had seemed to make intuitive sense. It was the first time I had to listen to what science was telling me and just say, "okay, if you say so."

[@TheRealYaworm]

One of my profs opened a course with "Fluid dynamics is where intuition goes to die"

[@IanJBarker]

@@TheRealYaworm THIS, I love.

[@mastershooter64]

@@TheRealYaworm He should study quantum mechanics lol that's where intuition goes to die, then get's revived then dies then gets revived then dies....repeat for infinite amount of time.

[@Metrion77]

@@mastershooter64 quantum mechanics is where science goes to die

[@mastershooter64]

@@Metrion77 quantum mechanics is a field of science

[@oldnotweak]

6:21 THAT is WHY laminar flow is cooler to experience. we experience turbulent flow all the time. when the wind is blowing its rare for it to all move smoothly over you, that feeling is a thousand times cooler because its rare

[@rajnishsubedi4265]

Yes agreed!

[@AzureHornet23]

"Turbulent flow is better than laminar flow" Destin: *You've yee'd your last haw, partner*

[@Blox117]

*shotgun loading noises*

[@HelloKittyFanMan.]

Yeah, except: What's the random apostrophe for?

[@TENGBINN]

This video give us great inspiration for a scientific paper published in Nature Communications. Big Thanks! The paper is about a digital, self-powered sensor array to sense aircraft aerodynamic stall by triboelectric and piezoelectric nanogenerator, in title of “Digital mapping of surface turbulence status and aerodynamic stall on wings of a flying aircraft”. DOI: 10.1038/s41467-023-38486-6. We also believe triboelectric nanogenerator is an interesting topic that we can talk about.

[@apexshinbi638]

"So where do you live?" *"Vortex Street"*

[@dmeemd7787]

Reynolds Street :-)

[@pppoopooman8585]

Shut up

[@LloydWaldo]

OR DO YOU

[@AdamA-wg1ko]

On the corner of turbulent and laminar

[@Emppu_T.]

I used to live on Power street now its harbor street

[@ajeemhussain2829]

This video was recommended after 17 seconds of posting.... Seems like am doing good things with my life. 😊

[@sunandinighosh6037]

Lol

[@aeonian_harshul]

You are subscribed to him, duh....

[@hmputra89]

A little revision: Blood flows through aorta in a LAMINAR flow, not turbulent. Turbulent flow is seen in diseased arteries.

[@vim1729]

Reference?

[@bryxlynn]

Mukul Joshi I got some for ya bud: www.cvphysiology.com/Hemodynamics/H006 www.cvphysiology.com/Hemodynamics/H007

[@flth1040]

@@vim1729 Davidovits "Physics in medicine and biology". One more thing, turbulence is dangerous because they will have y component and it will create force on the walls of blood vessels.

[@jayendraawasthi2646]

Actually i didn't knew about it but I was in doubt and I was right 😆

[@bigzechariahstrumskyyoutub366]

dr Huriah M Putra * your comment is VERY incorrect there are people who have pulsital tinnitus which is caused by turbulent flow even though they have no diseases arteries*

[@LttleTim]

This is actually what it means to take your sponsorship to a whole new level 💯💪🏼

[@LorenzMotors]

*shows up to airport* "Hey my name's Derek, may I touch your airplane?" "Uh, yeah sure Derek go ahead."

[@CoryMck]

That sounds about white to me

[@HamboPlayzMC]

do Derek's just get that perk? asking for a friend (that maybe doesn't wanna get shot after getting to said aircraft).

[@carlkenyon4599]

That is POPPING UP EVERYWHERE''s jet , it's for charter , so please feel free to rent it for all your needs .

[@無名兄弟-i7m]

Bro are you sponsored?

[@Merennulli]

I'm pretty sure you could ask someone working at a small airport if they knew anyone who would let you record a few minutes of educational video that included the specific feature of the plane you wanted to show. I don't know airports well enough to say who that would be, but someone who would actually talk to the pilots. The trick to a lot of this kind of access is getting introduced to the person you want to ask. If a stranger walks up to you and wants to take a picture of the inside of your car, you'd be freaked out and would probably say no without caring what the reason was. If the owner of the restaurant you regularly dined at brought someone to you and asked the same question, you'd more likely stop and listen to the reason and decide more calmly if it makes sense, if nothing else because you don't want to look like a jerk to someone you are acquainted with. Of course, they still have to have a good reason, but if they tell you that your car has some feature that is relevant to an educational topic that they can then explain to you in an interesting way, you'll probably say yes. Even if you don't, someone else will, and the only one we know about from these videos is the one that finally said yes. This is of course just one example. He could have just known someone with a plane, or asked the people he was interviewing if they knew someone who would let him record that segment. The Cal-Tech professor of fluid mechanics, Prof. McKeon, would be my first guess. I worked only 2 semesters as an adjunct professor, and I had more connections to others working in my industry when I left that job than I have in the 20 years of working far better paid jobs since.

[@brightbyte]

“Big whirls have little whirls, That feed on their velocity; And little whirls have lesser whirls, And so on to viscosity.” ― Lewis Fry Richardson

[@ivoryas1696]

*Lewiz _Fly_ Richardson

[@DavidAlvarado-js3qq]

Also referenced in Lupe Fiasco's Dots & Lines song off the Tetsuo & Youth Album.

[@Crowellcontracting]

What a great quote! Props and respect.

[@carlost.9233]

I love this poem/quote. It describes the nature of turbulence so nicely.

[@lyrimetacurl0]

The last line didn't really make much sense...

[@ComanderCool909]

Veritasium: *Yes, this is the background music I'll use* Me: *Checks every few minutes to see if I left KSP open*

[@ClaytonGinther]

I did the same exact thing

[@FriendlyFireAdventures]

same lol

[@cicianamumu]

What the HELL WHY? WHY CAN HE USE THAT ???? :))))

[@machielluchtmeijer7796]

what's KSP

[@Roixiong]

@@machielluchtmeijer7796 pretty much the best space game ever

[@michaelmcclain4062]

I know you'll likely never see this, but I absolutely love how excited you get on these subjects. Your videos often start with a simple question, calmly asked. But, you always seem to get really excited and it excites and intrigues me. I love your content.

[@randomdude9135]

*Destin from Smarter Everyday wants to know your location* Oh, he already knows your location

[@cleverername]

Shots fired at Destin

[@royk7712]

while carrying beret 50bmg

[@randomdude9135]

I made the comment b4 seeing Destin in this vid

[@blimibarker4089]

@@randomdude9135 Haha I was about to also 😂

[@schrodinger6991]

I am just writing this reply to boost your comment

[@herokillerinc]

This is such a friendly and fun conversation between two people who are intellectually curious! Thank you for everything both of you guys! A great example

[@JohnSmith-vk9sr]

Engineer: This highly predictable behavior is great! Scientist: This crazy stuff we don't really understand easily is great! Layman: DUH!!!!!

[@pidayrocks2235]

I'm an engineer but I must agree with the scientists on this one... particularly because I don't have to do precise calculations for turbulent flow (since you can't).

[@SpaceBearEngineer]

Laminar flow is easier to math, but for us Engineers turbulent flow gets things (like heat transfer and mixing and combustion) done!

[@howardlam6181]

@@SpaceBearEngineer Laminar flow gets things done too. Jet engine, Dyson fans (air multiplier invented by Toshiba), water pipe, etc.

[@SpaceBearEngineer]

@@howardlam6181 Can't forget contributing the lifting force for aircraft wings! (specifically, the pressure difference between laminar and turbulent boundary layers) :) That said, I'm not familiar with which part of a jet engine operates in the laminar flow regime. :( Having primarily studied combustion devices and working in liquid rocket engine development my familiarity with aircraft engines is limited to what I learned in school, mostly about the combustors. Those are turbulent environments, you generally need turbulent mixing for any type of high energy combustion to work, if I remember correctly "laminar combustion" is limited to candle-flame levels of heat output. I don't think the compressor or turbine can be laminar either, too much mass flow, too narrow, too many obstacles (turbine blades, stator foils, etc.) to trip the flow.

[@howardlam6181]

@@SpaceBearEngineer For the combusion part, yes, but for anything outside, the rotor, wing, it's all laminar flow.

[@Steenern]

Godsend algorithm recommending this right before my fluid mechanics exam

[@Marnige]

The thing about turbulent being everywhere is that it becomes too common. Laminar flow is rare and unique. "Like a diamond in the rough." - Edit: I just realised i misused this phrase. It doesn't even mean something is rare. Probably a needle in a haystack is a better phrase but not quite Edit: Basically, I find laminar flow in nature to be way more cooler because they're rare. But turbulent flow is way better for many uses as well. I am studying chemical engineering and turbulent flow is desired in many applications.

[@smolmen7674]

Diamonds aren't rare though

[@tile_guy]

@@smolmen7674 BrO StOP CaPpInG I plAy MiNEcRAfT

[@ImBarryScottCSS]

Ah but your analogy perfectly captures Derek's point! Diamonds are rare and they are pretty, but really, they're pretty boring. A common stone is far more interesting when you look closely and give the effort to try and understand it.

[@QixTheDS]

@@ImBarryScottCSS diamonds aren’t actually rare

[@TristanMundell]

“A diamond in the rough” is a figure of speech used to mean rare so therefore his statement is correct

[@Verlisify]

"Turbulent flow is the rule, Laminar is the exception" I'm now pro Turbulence

[@LeoStaley]

Turbulent flow is just regular flow. Laminar flow is special.

[@OtherSideOfMorning]

Laminarphobe!

[@tonesgaming1012]

Verlisify i did not expect to see you here

[@goldenhawx8652]

@@LeoStaley more like turbulent flow is the dad and laminar flow is the special child. Ppl love the child more than the parents 😂. Turbulent flow deserves more love.

[@mrpedrobraga]

@@goldenhawx8652 Why parents? Turbulent flow didnt raise laminar flow, the personification is irrelevant, gotcha! I don't even *love* laminar flow but it's far superior than turbulent..

[@ivantimofeev2233]

Veritasium: "Turbulent flow is cooler than laminar flow" SmarterEveryday:"So you have chosen death"

[@JamesSims]

LOL That is puttin' it right out there! Cut to the chase, I always say ...

[@DanielPowell9992]

Them's FIGHTIN' words!

[@gormauslander]

It's treason then

[@AalapShah12297]

Actually, I would expect it to be hotter, because of the energy dissipation.

[@barrywhite9114]

The Dumbest Will Prevail & the Smartest will be Defunded!

[@mattellinger7472]

Literally the most wholesome sponsor display ♡

[@willchen8581]

I almost expected him to say "This video is sponsored by turbulent flow"

[@ericcassidy6916]

This video brought to you by turbulent flow gang

[@5tr4nge75]

I'm more shocked by what he did say.

[@scumbagdyln]

"Destin has entered the chat"

[@dedebenui]

17:56 Should have included plain toilet paper for comparison. Also, even flushable wipes are still a pain for water treatment plants (episode 397 of 99% Invisible), just put any kind of wipes in the trash.

[@Porkey_Minch]

Yeah, it doesn't help if he's only comparing it with other things that you're not supposed to flush.

[@phosphorus4]

Also Adam Ruins Everything I was just thinking TP would just fall apart much faster…it wouldn't even hold 1 penny after 1 second… And they still had a percentage to begin with…

[@mikelabor7688]

As an old plumber, I am still fascinated by water, especially observing the surface of flow, on a stream or river. Thanks for posting.